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| Poor Stereo separation issue https://forums.stereotool.com/viewtopic.php?f=6&t=4754 |
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| Author: | brijeshsingh [ Mon Apr 01, 2013 7:50 pm ] |
| Post subject: | Poor Stereo separation issue |
Hi all, I am new to this forum and this is my first post, so I don't know what all the code of conduct is here. So I am just putting my problem here and hoping somebody will correct me if anything goes wrong. I have a perfect stereo encoder. Perfect in a sense, it gives around 70dB stereo separation once demultiplexed through MPX tool in a file mode. But once I am playing my composite signal through M-audio card(configured at192khz) and recording it back through same M-auido card (loop back in analog path), then that recorded file is not giving good separation. Then stereo separation is coming around 44dB. Can anybody suggest me whats wrong with M-audio card? What kind of card should I use for achieving 55dB of attenuation. I heard somewhere there are following factors that could limit the stereo separation: 1. Uneven attenuation at frequencies after 24 KHz in this cards frequency response. 2. Poor Low frequency tilt is another issue How to overcome such problems? Thanks for reading |
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| Author: | hvz [ Tue Apr 02, 2013 3:10 pm ] |
| Post subject: | Re: Poor Stereo separation issue |
If you measure like this, chances are that the card will have more problems recording the signal back than to play it, since recording quality is usually more of a problem than playback. If that's indeed the case, then the actual separation would be more (but I don't know how much, and I'm assuming that the sound card input does not 'correct' things in the output!) than 44 dB. |
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